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Merge branch 'bnxt_en-fixes'

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Michael Chan says:

====================
bnxt_en: Add workaround to detect bad opaque in rx completion.

2-part workaround for this hardware bug.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2016-05-11 23:46:09 -04:00
commit 1b7cc307a8
2 changed files with 65 additions and 0 deletions
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63
drivers/net/ethernet/broadcom/bnxt/bnxt.c
View File

@ -813,6 +813,46 @@ static inline struct sk_buff *bnxt_copy_skb(struct bnxt_napi *bnapi, u8 *data,
return skb;
}
static int bnxt_discard_rx(struct bnxt *bp, struct bnxt_napi *bnapi,
u32 *raw_cons, void *cmp)
{
struct bnxt_cp_ring_info *cpr = &bnapi->cp_ring;
struct rx_cmp *rxcmp = cmp;
u32 tmp_raw_cons = *raw_cons;
u8 cmp_type, agg_bufs = 0;
cmp_type = RX_CMP_TYPE(rxcmp);
if (cmp_type == CMP_TYPE_RX_L2_CMP) {
agg_bufs = (le32_to_cpu(rxcmp->rx_cmp_misc_v1) &
RX_CMP_AGG_BUFS) >>
RX_CMP_AGG_BUFS_SHIFT;
} else if (cmp_type == CMP_TYPE_RX_L2_TPA_END_CMP) {
struct rx_tpa_end_cmp *tpa_end = cmp;
agg_bufs = (le32_to_cpu(tpa_end->rx_tpa_end_cmp_misc_v1) &
RX_TPA_END_CMP_AGG_BUFS) >>
RX_TPA_END_CMP_AGG_BUFS_SHIFT;
}
if (agg_bufs) {
if (!bnxt_agg_bufs_valid(bp, cpr, agg_bufs, &tmp_raw_cons))
return -EBUSY;
}
*raw_cons = tmp_raw_cons;
return 0;
}
static void bnxt_sched_reset(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
{
if (!rxr->bnapi->in_reset) {
rxr->bnapi->in_reset = true;
set_bit(BNXT_RESET_TASK_SP_EVENT, &bp->sp_event);
schedule_work(&bp->sp_task);
}
rxr->rx_next_cons = 0xffff;
}
static void bnxt_tpa_start(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
struct rx_tpa_start_cmp *tpa_start,
struct rx_tpa_start_cmp_ext *tpa_start1)
@ -830,6 +870,11 @@ static void bnxt_tpa_start(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
prod_rx_buf = &rxr->rx_buf_ring[prod];
tpa_info = &rxr->rx_tpa[agg_id];
if (unlikely(cons != rxr->rx_next_cons)) {
bnxt_sched_reset(bp, rxr);
return;
}
prod_rx_buf->data = tpa_info->data;
mapping = tpa_info->mapping;
@ -867,6 +912,7 @@ static void bnxt_tpa_start(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
rxr->rx_prod = NEXT_RX(prod);
cons = NEXT_RX(cons);
rxr->rx_next_cons = NEXT_RX(cons);
cons_rx_buf = &rxr->rx_buf_ring[cons];
bnxt_reuse_rx_data(rxr, cons, cons_rx_buf->data);
@ -980,6 +1026,14 @@ static inline struct sk_buff *bnxt_tpa_end(struct bnxt *bp,
dma_addr_t mapping;
struct sk_buff *skb;
if (unlikely(bnapi->in_reset)) {
int rc = bnxt_discard_rx(bp, bnapi, raw_cons, tpa_end);
if (rc < 0)
return ERR_PTR(-EBUSY);
return NULL;
}
tpa_info = &rxr->rx_tpa[agg_id];
data = tpa_info->data;
prefetch(data);
@ -1146,6 +1200,12 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
cons = rxcmp->rx_cmp_opaque;
rx_buf = &rxr->rx_buf_ring[cons];
data = rx_buf->data;
if (unlikely(cons != rxr->rx_next_cons)) {
int rc1 = bnxt_discard_rx(bp, bnapi, raw_cons, rxcmp);
bnxt_sched_reset(bp, rxr);
return rc1;
}
prefetch(data);
agg_bufs = (le32_to_cpu(rxcmp->rx_cmp_misc_v1) & RX_CMP_AGG_BUFS) >>
@ -1245,6 +1305,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
next_rx:
rxr->rx_prod = NEXT_RX(prod);
rxr->rx_next_cons = NEXT_RX(cons);
next_rx_no_prod:
*raw_cons = tmp_raw_cons;
@ -2486,6 +2547,7 @@ static void bnxt_clear_ring_indices(struct bnxt *bp)
rxr->rx_prod = 0;
rxr->rx_agg_prod = 0;
rxr->rx_sw_agg_prod = 0;
rxr->rx_next_cons = 0;
}
}
}
@ -4462,6 +4524,7 @@ static void bnxt_enable_napi(struct bnxt *bp)
int i;
for (i = 0; i < bp->cp_nr_rings; i++) {
bp->bnapi[i]->in_reset = false;
bnxt_enable_poll(bp->bnapi[i]);
napi_enable(&bp->bnapi[i]->napi);
}

2
drivers/net/ethernet/broadcom/bnxt/bnxt.h
View File

@ -584,6 +584,7 @@ struct bnxt_rx_ring_info {
u16 rx_prod;
u16 rx_agg_prod;
u16 rx_sw_agg_prod;
u16 rx_next_cons;
void __iomem *rx_doorbell;
void __iomem *rx_agg_doorbell;
@ -636,6 +637,7 @@ struct bnxt_napi {
#ifdef CONFIG_NET_RX_BUSY_POLL
atomic_t poll_state;
#endif
bool in_reset;
};
#ifdef CONFIG_NET_RX_BUSY_POLL